Oven charger



B. B. KAHN.

ovEN CHARGER.

APPLICATION FILED .IUNE10, 1920.

Patented May 16, 1922.

3 SHEETS-SHEET I B. B. KAHN.

ovEN camere. l

APPLICATION FILED )UNE l0. i920.

Patented May 16, 1922.

3 SHEETS-SHEET 2.

B. B. KAHN. ovEN CHARGER; APPLICATION FILI-ID IUNE 19,1920.

Patented May- 16, 1922.,

3 SHEETS-SHEET 3.1

il` bl Pl' l aff,

BERTRAND B. KAHN, OF CINCINNATI. OHIO, ASSIGNOR T0 ESTATE STOVE COMPANY, OF HAMILTON, OHIO, .A CORPORATION OF OHIO.

OVEN CHARGER To @ZZ Lo/0m t may cof/weint.'

Be it known that I, BERTRAND B. KAHN,

a citizen ot the United States, residing at Cincinnati, in the county ot Hamilton and State of Ohio, have invented certain new and uset'ul improvements in OvenChargers, ot which the following is a tull, cleaiyconcise, and exact description, reference being had to the accompanying drawings, forming a part oit this specification.

My invention relates to improvements in oven chargers and is particularly concerned with impro\.f'ements in oven chargers used for charging muftle furnaces for the burning ot vitreous enamel. My invention is not, however, limited in its application to use in connection with mutl'le furnaces of this type but can also be used tor charging otherk types ot ovens, such as tempering, annealing,

bake ovens, etc.

The objects oi my invention are:

First: to provide a charger comprising means :tor supporting the work in a horizontal plane during both the charging and witlulrawiug operations, whereby the work is prevented from shitting its position on the charging device.

Second: to deposit the work upon the supporting tracks during the charging operation and litt it from the supporting tracks during the withdrawing operation by vertical movements.

Third: to provide means whereby the work can be accurately guided to prevent it from brushing against the supporting tracks and mul'lle walls either during the charging vor withdrawing operation.

Fourth: to provide means whereby comparatively large charges may be placed in the oven at one time. and Y Firth: to provide means ot the character described which is; simple in construction and eas;v and economicalto operate.

Sixth: to proifide an oven charger which may be loaded and unloaded properly and quickly by unskilled labor.

)ther objects will appear as this description progresses. reference being had tothe accompanying drawings in which,

Figure l is a side elevationot my improved :u )paratus certain portions thereof being broken away.,

Figure is a longitudinal transverse section taken on line 2 2 or' Figure l.

Specification of Letters Patent. Patgjtd Ray 1G, 192% Application filed June 10, 1920. Serial No. 387,978. i y

Figure 3 is a transverse section taken on line 3-3 or Figure l.

Figure 4l is a vertical transverse section taken 0n line lf- 4 of Figure l, and

Figure 5 is a vertical longitudinal section Heretofore in burning vitreousenamels in muiiie furnaces, the work has been charged into the furnace by supporting it on burning points carried by supporting bars,'the supporting bars being, in turn, carried by the prongs of a fork. The fork is provided with a handle which is carried on wheels and pivoted adjacent the orkso that by depressing the handle, the fork is elevated and vice versa. In charging the oven with such a fork, the work is placed on the burning points caried bythe fork and the handle is then depressed to elevate the ferr. The fork is then pushed forwardly on its wheels and into the oven; the handle is then elevated thus permitting the supporting bars to rest upon the supporting tracks of the muliie fur'- nace.

in using apparatus of this kind, not only .is considerable physical strength required,

but the workman must possess considerable skill, otherwise the work may be brushed against the sides of the supporting tracks, and mullie walls either in charging or withdrawing, and spoiled. It will, of course, be understood that ythe withdrawing operation is carried out in a reverse manner from that of charging. and requires the same amount ofstrength and` skill upon the part ot the workman; i

Another objection to the apparatus at present in general use for charging muttle furnaces is that iny depositing the supporting bars and work from the charging forkl onto thesupporting tracks and likewise in removing the supporting bars and work 'from the supporting tracks, the work 1s held in an inclined position so that the supporting bars do not retain the same position during successive chargings. i

The obfects or my present invention are, as stated above, to overcome these objections to the apparatus heretofore employedy tor this purpose. Referring to the drawings, the reference characters 10 indicate two I-beams suitably mounted in spaced parallel relation by the U-shaped supporting trames 11. The carriage comprising suitable `side members 12, a cross beam 13 and a platform 14 is provided with wheels 15 which roll upon the inner lower flanges 16 of the 1-beam 10, the upper inner flanges 17 of the l-beampreventing the tilting of the carriage longitudinally ot the tracks. The wheels are provided with flanges 1S for holding the carriage in par-- allel relation to the tracks. A vertical guide column 2O is supported bythe platform 141. VvAsecond carriage comprising the cross beams 21 and the .guide plates 22`whieh are secured to the cross beams 21 as'shown in Figures 1, 8 and 5, is mounted to slide upon the vertical guide colun'xn`20, the vertical extensions ot the guide plates 22 being bolted together in spaced relation by the bolts 23 and 2d. I

Anti-friction rollers 25, 26, 27 and 28 are secured between the guide plates 22 as shown in Figures 1, and 3 to minimize, as much as possible, the friction between the second carriage and the vertical guide column 20. The two guide plates 22 and the anti-friction rollers 25, 26, 2T and 26 form a guide member lor co-acting with the vertical guide column 2O to cause the second carriage to move upwardly and downwardly in a. vertical direction as will be described later on. Charging bars 30 have their rear ends secured to the opposite ends of the cross beams 21 by the U-clamps 31, the charging bars thus being held in spaced parallel relation with their front ends projecting beyond the front end of the carriage rolling on the tracks 10. The front ends of the charging bars 30 carry the supporting bars 32 having the burning points 33, the supporting bars and burning points being of the usual construction.

The weight of the work on the supporting bars will tend to tip the upper end of the guide column 2O forwardly. To prevent this, I provide the two guy rods 35, the upper ends of which are secured to the cross plate 36 on the upper end of the guide column 20 and the lower ends ot which are secured to the rear ends ot the flanges 37 projecting from the inner sides of the side members 12 of the carriage traveling on the tracks 10. The upper end of the guide column 2O is provided with laterally extending lugs [l0 which co-act with the compression springs l1 to yieldingly limit the upward travel ot the carriage mounted on the guide column 20.

For elevating the carriage which slides on the guide column 20, 1 provide a cylinder L15 which is supported by the pedestal L16, the lower end et which is connected with the lugs 47 on the platform 14 (see Figure fr) by means of a pivot pin 18. A piston, not

shown, slides in the cylinder l5 and is connected with the piston rod 50, the upper end ot which is pivotally connected with the side pla-tes 22 by the pivot pin 51. With this construction, the cylinder 15 is tree to align itself with the piston rod 50, thereby preventing any binding action.

Steam, air, water or other fluid can be supplied to the cylinder Ll5 in any desired 'mannen the means which l have illustrated for accomplishing this result comprising a pipe 5S, the lower end o1' which is connected with the end of cylinder l5 and to the upper end oil which is connected one end ot the flexible conduit The other end of the flexible conduit is'connected with the riser 55 which, in turn, is connected with a source of iiuid under pressure. The 'flexible conduit 541 passes over the pulley 56. The takeup sheave 57 carrying a weight 58 rides on 'the lie-faible conduit intermediate the pulley 56 and the point oit attachment of the flexible conduit ilto the riser 55.

lVith the construction above described, when .fluid is admitted to the cylinder d5, the piston therein is forced upwardly carrying the side pla es 22, the cross beams 21 and the charging bars 30 upwardly. The supply ot `fluid to the cylinder l5 can be controlled by a valve or any other suitable ymechanism located at any desired point.

For moving the carriage back and 'forth upon the tracks 10, l provide a cylinder 60 which is located beneath the tracks 10 and supported by the two rear frame members 11. il piston (not shown) slides in the cylinder 6() and is provided with a piston rod 61 which projects through the iront end oi the cylinder. The forward end ot the piston rod 61 is bifurcated as shown in Figure 2 and two sheaves 62 and 63 are rotatably supported between the bifurcations. rllwo pulleys Gel rotatably mounted outside ot the bifurcations of the piston rod, ride upon the tracks 65 and thus support the outer end ot the piston rod. A. grooved pulley 6G is rotatably mounted between the liront ends ot the tracks 10 in alignment with the sheave 63 and a similar grooved pulley 67 is rotatably mounted between the rear ends ot the tracks 10 in alignment with the vsheave 62. A iexible cable 68 has its intermediate por`l tion trained over the .pulleys 66 and 67. The end of the cablel which passes over the grooved pulley 66 is then carried backwardly and around the rear side or' the sheave 63 and secured to the eye 70 of the tension rod 71, the front end ot' which is secured to the forward lrame member 11. The other end of the cable is brought 'forward and passed around the sheave 62, then carried rearwardly ane secured to the eye 72 of the tension rod T3 which, in turn. is secured to the rear trame member 11. Air, steam or water, under pressure. can be supment of the piston in the cylinder 60; consequently, to move the carriage from one end vof the tracks l0 to the other end requires a cylinder one half the length of these tracks. it will, of course, be clearly understood that by a modified arrangement of the cables, the

length of the cylinder could be still further" reduced.

lin the operation of my improved apparatus, the work is placed upon the burning points, the oven door is then opened, fluid is admitted to the cylinder l5 in sufficient quantity to raise the charging bars 30 to a level to bring the bottom edges of the supportingl bars 32 yabove the tops of the supporting tracks in the furnace. then admitted to the front end of the cylinder GO through the .pipes 7a whereupon` the piston rod 6l is drawn into the cylinder carrying the sheaves 62 and 63 rearwardly and thus causing the upper part of the cable k68 to move forwardly. This portion of the cable is secured to the carriage rolling on the tracks 10 by means of a suitable clamp 80 (see Figure 2.) mounted on the cross beam 13, consequently, the carriage moves forwardly with the cable GS. When the carriage is moved forwardly sufficient to properly place the work with respect to the supporting tracks, the supply of fluid to the cylinder 60 is interrupted and the actuating fluid is then vented kfrom the cylinder through the conduit 54 and riser 55, and a suitable valve (not shown) or in any other desired manner. The carriage slidable on the column 20 thereupon descends, thus permitting the ends of the supporting' bars 32 to rest upon the supporting tracks of the furnace. Fluid under pressure is then admitted to the rear end of the cylinder through the pipe 7 5 and the forward end of the cylinder is vented through the pipe 74. The cable is thereupon actuated to move the carriage rearwardly on the tracks 10 whereby the charging bars 30 are withdrawn from the furnace, the door to which can then be closed.

lVhile l have described the details of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details nor to the specific use in connect-ion with which l have explained its operation. but is ,capable of otheradaptations and modiiications within the scope of the appended claims.

Fluid is- Havingthus described my invention, what I claim is: n

l. The combination with a track,'of a car` riage horizontally movable thereon, a ven tical guide column mounted on said carriage, a second carriage slidably mounted onsaid guide column and comprising an elongated guide member having an antiefriction roller at the lower end of its front side and the upper end of itsrear side bearing lon said guide column, a charging bar secured to said second carriage and projecting beyond the front end of said first-named carriage, means for elevating said second carriage comprising a cylinder supported on said Hirst-named carriage and a piston mounted in said cylinder and ,connected .with the upper end ofsaid elongated guide member,

and means for moving said first-named carriage backward and forward on saidtrack comprising a second cylinder located beneath said track, a piston sliding in said second cylinder yand having a piston rod projecting from the end thereof, two sheaves carried by the outer end of said piston rod, supportingwheels for the, front end of said piston rod, tracks for said supporting wheels, a single sheave at each end ofsaid iirst-named track, a cable trained over said single sheave, one end of said cable passing over one of the sheaves carried by said piston rod and secured adjacent to the rear end of said track, the other end of said cable passing over the opposite side Aof said other sheave carried by said piston rod and secured adjacent to the front end of said track and means for securing said iirstnamed carriage to the portion of said cable extending between said single sheaves.

2. The combination with a track, of a carriage horizontally movable thereon, a vertical guide column mounted on said carriage, second carriage slidably mounted on said guidel column and comprising an elon` gated guide member bearing on said guide column, a charging bar secured to said second carriage and projecting beyond the front end of said first-named carriage, means for elevating said `second carriage comprising cylinder supported on said rst-named carriage and a pistonfmounted in said cylinder and connected with the upper end of said elongated guide member, and means for moving said Erst-named car-v riage backward and forward on said track comprising a second cylinder, a piston sliding insaid second cylinder and having a piston rod projecting from the end thereof, two sheaves carried by said piston rod, a single sheave at each end of said iirst-named track, a cable trained over said single sheave, one end of said cable passing over one of the sheavescarried by said piston rod and secured adjacent to the rear end of said traclnthe other end of said cable passing over the opposite side of said other sheave carried by said Piston rod and secured adjacent to the iront end of said track and means for securing said first-named carriage to the portion of said cable extending between said single sheaves.

3. rllhe combination with a track, of a carriage horizontally movable thereon, a vertical guide column mounted on said carriage, a second carriage slidably mounted on said guide column and comprising a guide member' bearing on said guide column a charging bar secured to said second carriage and projecting beyond the front end of said first-named carriage, means for elevating said second carriage comprising a cylinder supported on said first-named car* riage and a piston mounted in said cylinder and connected with said guide member, and means for moving said first-named carriage backward and orward on said track comprising a second cylinder, a piston sliding in said second cylinder and having a piston rod projecting from the end thereof, sheaves carried by said piston, a cable connected to said irst-named carriage and having its ends anchored and intermediate portions passing over said sheaves for moving said iirst-named carriage backwardly and forwardly over said track.

4. The combination with a track, of a carriage horizontally movable thereon, a vertical guide column mounted on said carriage, a second carriage slidably mounted on said guide column and comprising a guide member bearing on said guide column, a charging bar secured to said second carriage and projecting beyond the iront end of said first-named carriage, means for elevatino` said second carriage com arising a` CD f3 b cylinder supported on said first-named carriage and a piston mounted in said cylinder and connected with said guide member, and means for moving said first-named carriage backward and forward on Lsaid track comprising a second cylinder, a piston sliding in said second cylinder and having a piston rod projecting from the end thereof and connections between said piston rod and said tirst-namedcarriage for moving said iirst-named carriage in either direction, a distance greater than the distance traveled by said piston.

5. rlhe combination with a track, of a carriage horizontally movable thereon, a vertical guide column mounted on said carriage, a second carriage slidably mounted on said guide column, charging bar secured to said second carriage and projecting beyond the iront end oi' said first-named carriage, means :tor elevating` said second carriage comprising a cylinder supported on said first-named carriage and a piston mounted in said cylinder and connected with said second-named carriage, and means tor moving said rst- :1a-insges@c carriage, means for elevating said second carriage comprising a vcylinder supported on said first-named carriage and a piston mounted in said cylinder and connected with said second named carriage, and means 'for moving said iirst-named carriage backward and forward on said track.

7. Thecombination with a track, of a carriage horizontally movable thereon, means tor moving the carriage, a vertical guide column mounted on said carriage, a member slidable on the column, a second carriage secured to said member, a charging bar secured to said second carriage and extending beyond said first carriage, and means for operating said member.

, 8. The combination with a track, ot a carriage horizontally movable thereon, means for moving the carriage, a vertically slidable support mounted on said carriage, a second carriage secured to said support, a charging bar secured to said second carriage and extending` beyond said first carriage, and means for operating said support.

9. The combination of a horizontally movable carriage, a vertical guide column mounted on said carriage, a second carriage slidably mounted on said guide column, a charging bar secured to said second carriage and projecting beyond the front end of said irst carriage, and means for elevating said second carriage comprising a cylinder supported on said iirst carriage and a piston mounted in said cylinder and connected with said second carriage.

l0. The combination ot a horizontally movable carriage, a vertical guide column mounted on said carriage, a member slidable on the column, a. second carriage secured to said member, a charging bar secured to said second carriage and ext-endingbeyond said first carriage, and means for operating said member,

ll. The combination of a horizontally movable carriage, a vertically slidable support mounted on said carriage, second carriage secured to said support, a charging bar secured to said second carriage and extending beyond said rst carriage, and means for operating said support.

12. The combination with a track, of a carriage horizontally movable thereon,

ineens for moving the carriage, a second carriage vertically movable on the first carriage, vertically slidable means mounted on the first carriage for raieing and lowering the second carriage, and a charging bar Secured to the second carriage and projecting beyond the `front end of the first carriage.

13. The combination of a horizontally movable carriage, L second carriage Vertically movable on the first carriage7 vertically slidable means mounted on the irst carriage for raising and lowering the second carriage, and a charging bar secured to the second Carriage and projecting beyond the front end of the first. carriage.

In Witness whereof, I hereunto subscribe my name this 28th day of May, 1920.

' BERTRAND B. KAHN.. Witnesses:

DORA TREMEYER, R. R. ASBURY. 

